You might be setting yourself up for failure with out a Roundup burn down, soil test, and ability to maintain the plots. If It gets above 55 over night, attempt a roundup spraying even with a hand carried sprayer. Alsike clover may be our ticket, two or three mowings would help alot. An ATV spreader for lime, phosphorus, and potassium would improve your odds too. Keep the Nitrogen as low as possible so you're not feeding the grass and weeds.